Bus-Isolated Voltage Adjustment for Stable Master-Slave Circuits
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Solution Overview
Problem
Unstable operating voltages in electronic devices can cause malfunctions, and existing control devices lack effective mechanisms to adjust and stabilize output voltages efficiently.
Innovation Solution
A control device comprising a master circuit, a slave circuit, and a power-scaling control circuit that connects and disconnects buses to manage voltage adjustments, allowing the power-scaling control circuit to pause access between the master and slave circuits during voltage adjustments, ensuring stable operating conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the master circuit continuously accesses the slave circuit via the bus, then data communication efficiency is improved, but voltage adjustment operations cannot be performed without causing false operations
Solution Approach 1:
The bus interface circuit dynamically switches between two operational states: a first state where the master circuit can access the slave circuit for data communication, and a second state where voltage adjustment is enabled by preventing master access. This dynamic state transition allows the system to adapt between communication efficiency and voltage adjustment stability based on operational requirements
Solution Approach 2:
The bus interface circuit acts as an intermediary between the master circuit and slave circuit. It receives control signals from the master circuit to determine whether to permit or block access to the slave circuit, thereby mediating the conflict between continuous data communication and voltage adjustment operations. The intermediary controls the timing and conditions under which master access is granted or denied
2Duration of action of stationary object
If the master circuit is allowed to access the slave circuit during voltage adjustment, then data communication continuity is maintained, but false operations occur due to unstable voltage
Solution Approach 1:
Before voltage adjustment begins, the system preemptively blocks the master circuit from accessing the slave circuit by controlling the bus interface circuit to a second state. This preliminary anti-action prevents potential false operations that would occur if access were permitted during voltage instability, eliminating the harmful effect before it can manifest
3Reliability
If the master circuit access to slave circuit is blocked during voltage adjustment, then false operations are prevented, but data communication efficiency decreases
Solution Approach 1:
The system implements periodic alternation between communication mode and voltage adjustment mode. During normal operation, the master circuit accesses the slave circuit for data communication. When voltage adjustment is required, the system temporarily transitions to adjustment mode, blocks master access, performs the voltage adjustment, then returns to communication mode. This periodic switching minimizes the impact on overall communication efficiency while ensuring reliable voltage adjustment
Data Source
AI summary
A control device is used to adjust an output voltage of a voltage generator, and includes a master circuit, a slave circuit, and a power-scaling control circuit. The master circuit is coupled to a first bus. The slave circuit is coupled to a second bus. In a normal mode, the first and second buses are connected to each other via the power-scaling control circuit, the master circuit accesses the slave circuit via the first and second buses. In an adjustment mode, the power-scaling control circuit controls the master circuit to stop accessing the slave circuit, and the power-scaling control circuit adjusts the output voltage. When the master circuit sends a trigger signal, the power-scaling control circuit enters the adjustment mode. When the master circuit does not send the trigger signal, the power-scaling control circuit enters the normal mode.